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Although resetting your MacBook Pro to factory defaults is simple, there are some preliminary steps that you must take to ensure smooth transition (from the current OS to the fresh installed one) and to keep your data safe.

Note: If you have enabled FileVault, you should also consider turning it off before proceeding by going to Apple menu System Preferences Security Privacy FileVault.

The process may take considerable amount of time, depending on the data on your hard drive it has to decrypt.

In the second phase, you reset your MacBook Pro to the factory defaults.

Note: After resetting, you can restore your data back to your MacBook Pro.

Heres how you can safely factory reset your MacBook Pro: PHASE 01: PRE-RESET ACTIONS Back up your data (using Time Machine) Connect an external storage device to your MacBook Pro, click the Apple logo, click System Preferences, click Time Machine, click Select Backup Disk, select the storage you just connected, and click Use Disk.

Depending on the size of data your hard drive has, the process may take some time to complete.

From this point onward, your MacBook Pro is no longer associated with your iCloud account.

From here you can manage the hard disks and other storage devices your MacBook Pro has, restore Time Machine backups, etc.

This erases the selected drivepartition, and re-creates its file system.

At this point, the diskpartition no longer has any of your personal data or the operating system as everything has been wiped off.

Re-install macOS High Sierra Close the Disk Utility window, select Reinstall macOS on the macOS Utilities window, click Continue, and follow the on-screen instructions from there.

This re-installs macOS High Sierra on your MacBook Pro afresh.

Because the fresh installation of the operating system doesnt have any third-party or additional apps, and all the built-in programs are in their default settings, you can begin using the factory restored MacBook Pro as a new device.

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Reset Osx 2017